Abrading wheel



Dec. 31, 1957 A. RA'SKE, 2,817,932

ABRADING WHEEL Filed Feb. 21, 1957 I 2 Sheets-Sheet 1 INVENTOR. A R THUR RA SK E Dec. 31, 1957 A. RASKE 2,817,932

ABRADING WHEEL Filed Feb. 21, 1957 2 Sheets-Sheet 2 INVENTOR. ARTHUR RA 5K5 United States Patent ABRADING WHEEL Arthur Raske, Willoughby, Ohio Application February21, 1957, Serial No. 641,704

11 Claims. (Cl. 51-191) My invention relates to a new and useful improvement in an abrading wheel on which may be fitted an abrasive sleeve in the form of a flexible endless band.

It is an object of'the present invention to provide a wheel of this class which will be simple instructure, economical of manufacture, durable, compact and highly efficient in use.

Another object of this inventionis the provision of an abrading wheel of this class embodying a rigid core, having longitudinally'extended peripherally disposed slots or notches for the'reception'of'flexible bandengaging members which serve to engage the inner-surface of a plurality of encircling flexibleabrasive bands and which flex outwardly during rotation of 'the core to ,securely'retain the band in operativeposition relative-to the core during an abrasive operation.

Another object of this "inventionisthe provision in an abrasive wheel of this'cl-ass ofaplurality of flexors or flexible presser members mounted and arranged in a plurality of longitudinally .extended peripherally disposed slots on a rotatable rigid-core,-so thattheflexors or presser members may be readily removedand replaced when desired.

Other objects will appear hereinafter.

It is recognized that various modificationsand changes may be made in'the detail of -structure.-illustrated and it is intended that the .present disclosure shall be considered to be but a preferred embodiment.

Forming a part of this application are drawings in which: I

Fig. 1 is a front side elevational viewof-a first embodiment of the invention showing the flexible presser members in operative position during rotation of the abrasive wheel;

Fig. 2 is a horizontal sectional view of the structure illustrated in Fig. 1, taken along the line 2-2 thereof and looking in the direction of the arrows;

Fig. 3 is an illustrative perspective viewof the type of removable flexible presserxmembers employed in the embodiment of Fig. .1;

Fig. 4 is a front elevational :view of asecond embodiment of the invention showing the flexible presser members in operative position 'during'rota'tion of the abrasive wheel;

Fig. 5 is a horizontal sectional view of the structure illustrated in Fig. 4, taken along the line 55 thereof and looking in the directionof the arrows;

Fig. 6 is an illustrative perspectiveview of the type of removable flexible presser members employed in the structure illustrated in Fig. 4;

Fig. 7 is a partial elevational view of the str-ucture illustrated in Fig. 1 and'showing the flexible presser members in the inoperative position "when the abrasive wheel is stationary;

Fig. 8 is a partial elevational =view zof'ithe structure illustrated in Fig. 4, showing thei flexible presser members in an inoperative position when the abrasive wheel is stationary;

Fig. 9 is a front elevational view of a third embodiment of the invention showing the flexible presser members in operative position .during rotation of the abrasive wheel;

Fig. 10 is a partial elevational view of the structure illustrated in Fig. 9, showing the flexible presser members in the inoperative position when the wheel is stationary;

. Fig. 11 is a horizontal sectional view of the structure illustrated in Fig. 9 taken along the line 11-11 thereof and looking in the direction of the arrows; and

Fig. 12 is an illustrative perspective view of the type of removable flexible presser members employed in the embodiment illustrated in Fig. 9.

Referring now to the drawings and in particular to Figs. 1, 2, 3 and 7, wherein is shown the first embodiment of the invention comprising a cup-shaped core, generally indicated by the numeral 15, and which includes a flat circular plate or wall 16 having an outwardly extended peripheral lip or flange 17. The flange 17 is provided with a plurality of longitudinally extending peripherally disposed slots 18 which extend from the outer end of the lip 17 inwardly to the inner face of the wall 16, as indicated by the numeral 19. The core 15 is provided with a plurality of reinforcingmembers or ribs 20 which are radially disposed around the inner face of the plate 16, and which are integral therewith and extend from the outer face of the lip 17 and taper inwardly to the wall 16.

Theabrading wheel disclosed in Fig. V1 is provided with a plurality of fleXors or flexible presser members which are generally indicated by the numeral 21. The presser members 21 are made from any suitable resilient material, such as rubber, and are substantially L-shapedin crosssection. Each of the presser members 21 comprises .a vertical leg portion 22 which is provided along the lower end thereof with a'pair ofoppositely disposed and aligned longitudinally extended slots 23 and 24. The presser ice .members 21 are adapted to be mounted around the. periphcry of the core 15 with the reduced neck portion 22b of the leg 22 being slidably mountedin one of the grooves 18 in the lip 17. The edges ofthe lip 17 adjacent each of the slots 18 are adapted to fit into the longitudinal slots 23 and 24 in the respective presser member mounted in each of the slots 18. The inner side faces 22a of each of the legs 22 of the'flexible presser membersare provided with a cut-out portion as indicated by the numeral 26a, whereby the leg portions 22 may overlap and sit on the peripheral faceof the core wall 16, as shown in Fig. 2. The leg portion 22 of each of the presser members 21 is provided with an integral retaining head portion 25 which is adapted to abut the'inner face of the flange 17. Each of the flexible presser members 21 is provided with a flexible head 26 which isintegrally connected with the legportion 22. As shown in Fig. 3, the flexible head of each of the' presser'members 21 isconnected at one end thereof in cantilever style to the leg portion 22. The upper outer surface of each of the flexible heads 26 is curved, as indicated by the numeral 27. As clearly shown in Fig. 3, the flexible heads 26 of each of the presser members 21 are spaced upwardly from the leg portion 22 as shown by the slot indicated by the numeral 28. As shown in Figs. 1 and 2, an annular sleeve or band of abrasive material indicated by the nu- 'mera1 29 is adapted to beseated around the core '15 and 31, having a reduced threaded end portion 32. The

shaft reduced portion 32 would be mounted through the aperture 30. A pair of retainer washers as 33. and 34 would be disposed on the reduced shaft portion 32 on opposite sides of the core wall 16. A conventional retaining nut 35 would be mounted on the end of the threaded reduced shaft portion 32 so as to tighten the assembly onto the shaft 31. The core 15 may he made from any suitable rigid material, but is preferably formed from a metal which may be easily cast.

When the abrading wheel shown in Fig. l at rest, the flexible heads 26 of the presser members 21 will be relaxed and in the position shown in Fig. 7. Accordingly, the flexible abrading band 29 may be easily mounted over and around the presser heads 21. When the wheel is rotated, the flexible heads 26 will swing outwardly due to centrifugal force into the position shown in Fig. l, and the abrasive band 29 will be stretched taut and held in fixed relation relative to the core 15 while an abrading operation is performed.

It is believed obvious that the band 29 of abrasive or grinding material may be easily removed and replaced. Likewise should any of the flexible heads 26 become worn or damaged, they may also be replaced by sliding the legs 22 axially out of the slots 18 in which they are engaged. The bead 25 on each of the flexible presser members 21 prevents these members from moving radially outwardly relative to the peripheral lip 17. Experience has shown that a grinding or abrasive wheel of this type is one which is highly eflicient in use and economical in operation.

A second embodiment of the invention is shown in Figs. 4, 5, 6 and 8, and comprises a core generally indicated by the numeral 36. The core 36 includes the flat circular plate or wall 37 and the peripheral lip or flange 38. The lip 38 is provided with a plurality of longitudinally extended peripherally disposed slots 39 which extend inwardly to the Wall 37 as indicated by the numeral 40. The core 36 is provided with a plurality of radially disposed reinforcing members or ribs 41 which extend from the inner face of the peripheral lip 38 inwardly to the inner face of the core wall 37. The embodiment of Fig. 4 is provided with a plurality of flexors or flexible presser members which are generally indicated by the numeral 42, and which are substantially U-shaped in cross-section. Each of the presser members 42 includes a pair of vertical laterally spaced apart legs 43 and 44 which are connected at the upper ends thereof by an integral flexible head 45. Integrally formed on the lower end of each of the legs 43 and 44 is a retaining bead as indicated by the numerals 46 and 47 respectively. The legs 43 and 44 are adapted to be slidably mounted in a pair of adjacent slots 39 whereby the head 45 might be said to be looped between two adjacent slots 39. The retainer beads 46 and 47 retain the legs 43 and 44 respectively in their respective slots 39, but do permit some radial movement of the legs 43 and 44 in their respective slots. As shown in Fig. 5, the legs 43 and 44 abut the inner face of the core 37 as indicated by the numeral 48 and the head 45 extends over the inner edge of these legs and extends over the periphery of the core wall 37 at the point indicated by the numeral 49. The head 45 of each of the flexible presser members 42 is provided with an upper curved surface as indicated by the numeral 50. As shown in Fig. 4 a band or sleeve of abrasive material as indicated by the numeral 51 is adapted to be operatively mounted around the wheel and is engaged on the inner side thereof by the curved surface 50 of the flexible presser members 42.

The core wall 37 is provided with a central aperture therethrough, as indicated by the numeral 52. The abrading wheel illustrated in Figs. 4 and may be mounted on any suitable means for rotation thereof. An illustrative means for rotating the wheel of the embodiment of Figs. 4 and 5 is shown in Fig. 5, and comprises 4 the shaft 53 which is provided with a reduced threaded end portion 54 which is adapted to be operatively mounted in engagement with the aperture 52. The wheel may be fixedly mounted on the shaft portion 54 by means of the retainer washers 55 and 56 and the conventional lock nut 57.

When the abrading wheel of Figs. 4 and 5 is at rest or in a stationary position, the flexible presser member 42 will assume the position indicated in Fig. 8. In the stationary position, the legs 43 and 44 of each of the presser members 42 will move inwardly readily relative to the lip 38, and when in this position the abrading band 51 may be easily and quickly mounted over and around the presser member 42. When the wheel is rotated. the legs 43 and 44 will be moved radially outwardly to the position shown in Fig. 4 due to centrifugal force. The outward movement of the legs 43 and 44 will bring the entire curved face 50 of the presser members 42 into engagement with the inner face of the abrasive band 51, and this band will be stretched taut and held in fixed relation relative to the core 36 while an abrading operation is performed.

A third embodiment of the invention is shown in Figs. 9, 10, 11 and 12, and comprises a core generally indicated by the numeral 58 and which includes a flat circular plate or wall 59. The wall 59 is provided with an integral peripheral lip or flange 60. A second lip or flange 61 is formed integral with the wall 59 and is based radially inwardly from the lip 60 and is concentric therewith. The flanges 60 and 61 are connected by a plurality of integrally spaced apart radially disposed walls 62 which divide the space between the flanges into a plurality of retaining chambers generally indicated by the numeral 63. The core 58 further includes the integral hub 64 which extends outwardly from the wall 59 which is in the same direction as the flanges 60 and 61 and which is concentric therewith. The core 58 further includes a plurality of radially disposed reinforcing members or ribs 65 which are integrally mounted between the outer face of the hub 64 and the inner face of the inner flange 61, and which are evenly and radially disposed around the hub 64. The outer lip or flange 60 is provided with a plurality of longitudinal slots 66 which are centrally disposed relative to each of the chambers 63 between the flanges 60 and 61. The slots 66 extend inwardly from the outer edge of the flange 60 to the core wall 59 as indicated by the numeral 67 in Fig. 11.

As shown in Figs. 9 and 12, the third embodiment includes a plurality of flexible presser members generally indicated by the numeral 68. Each of the presser members 68 includes a leg portion 69 which is provided on the lower end thereof with an integral longitudinally extending head 70. An integral flexible head 71 is connected to the upper end of the leg 69. As shown in Fig. 12 each of the flexible heads 71 is connected to their respective legs 69 at one end of the head 71 in cantilever fashion. The upper face of each of the flexible heads 71 is curved as indicated by the numeral 72. As shown in Fig. 9, an annular sleeve or band of abrasive material 73 is operatively mounted on and around the outer curved face 72 of the presser members 68.

The abrasive wheel illustrated in Figs. 9 and 11 may be mounted on any suitable rotation means. An illustrative means for mounting the third embodiment of the invention is illustrated in Fig. 11, and includes a shaft 74 which is provided with a reduced threaded end portion 75 which is adapted to be threadably mounted in the threaded bore 76 in the hub 64. The abrasive core 58 may be fixedly secured on a shaft 74 by means of the retaining washers 77 and 78 and the lock nut 79.

The third embodiment shown in Fig. 9 functions in a manner similar to the first embodiment shown in Fig. 1. When the abrasive wheel of Fig. 9 is in a stationary or at rest position, the flexible head 71 will normally be disposed in the position shown in Fig. 10, and the flexible abrasive band 73 may be quickly and eas ly mounted around the flexible presser members [68. When the presser members 68 from moving radially outwardly of the lip 60 since the beads 70 engage the inner face of the outer flange .60 and the inner face of the flange 61.

It willbe seen that the flexible heads of all ofthe three embodiments are curved convexly outwardly so as to be evently embraced by their respective encircling abrasive band. It will also be seen that the flexible heads of all three embodiments extend from the-outer edge of the abrasive member retaining flange'and inwardly over their respective core plate or wheel. If it is desired to provide an abrasive wheel of a largerwidth than'the one wheel, such larger wheel may be formed 'by mounting two of 'the abrasive wheels .side by side .on the driving's'haft with the core .plates being disposed adjacent to each other.

What I claim is:

1. An abrasive wheel of the class described, comprising: a rigid rotatable core including a circular plate provided with a laterally extended peripherally disposed flange; said flange being provided with a plurality of axially extended slots which are open on the free end thereof; a plurality of presser members slidably mounted in said slots; each of said presser members being provided with a flexible head freely available for radial expansion by centrifugal force; said flexible heads extending predominantly in one circular direction; each of said flexible heads being provided with a curved outer face; and, an encircling band of abrasive material embracing said heads.

2. An abrasive Wheel of the class described, comprising: a rigid rotatable core including a circular plate provided with a laterally extended peripherally disposed flange; said flange being provided with a plurality of axially extended slots which are open on the free end thereof; a plurality of presser members slidably mounted in said slots; each of said presser members including a leg portion adapted to be mounted in one of said slots; a head on the inner end of each of said leg portions for limiting the radial outward movement of the presser members; each of said presser members being provided with a flexible head freely available for radial expansion by centrifugal force; said flexible heads extending predominantly in one circular direction; each of said flexible heads being provided with a curved outer face; and, an encircling band of abrasive material embracing said heads.

3. An abrasive Wheel of the class described, comprising: a rigid rotatable core including a circular plate provided with a laterally extended peripherally disposed flange; said flange being provided with a plurality of axially extended slots which are open on the free end thereof; a plurality of presser members slidably mounted in said slots; each of said presser members including a leg portion adapted to be mounted in one of said slots; a bead on the inner end of each of said leg portions for limiting the radial outward movement of the presser members; each of said presser members being provided with a flexible head freely available for radial expansion by centrifugal force; said flexible heads extending predominantly in one circular direction; each of said flexible heads being provided with a curved outer face; an encircling band of abrasive material embracing said heads; and, a plurality of radially disposed reinforcing members interconnected between the inner face of said plate and the inner face of said flange.

4. An abrasive wheel of the class described, comprising: a rigid rotatable core including a circular plate provided with a laterally extended peripherally disposed flange; said flange being provided with a plurality of axially extended slots which are open on the free end thereof; a plurality .of presser members .slidably mounted in said slots; each of :said presser members being provided with a flexible head freely available for radial-expansion by centrifugal force; each of said flexible heads'being provided with a curved outer face; and, an encircling band of abrasive material embracing said heads.

5. 'An abrasive wheel of the class described, comprising: a rigid rotatable core including a circular plate provided with a laterally extended peripherally disposed flange; said flange being provided with a plurality of axially extended slots which are open on the free end .thereof; a plurality of presser members slidablymounted in said slots; each of said presser members including a leg portion adapted to be mounted in one of said slots; a bead on the inner end of each of said leg .portions for limiting the radial outward movement of the pressermembers; an annular flange mounted on said plate andextending axially outwardly therefrom and being concentric with said peripherally disposed flange and abutting the beads on said leg portions for limiting radial inward movement of the presser members; each .of'saidtpresser members being provided with aflexibleheadfreely .available for radial expansion by centrifugal force; said flex ible heads extending predominantly in one circular direction; each of said flexible heads being provided with a curved outer face; an encircling band of abrasive material embracing said heads; and a plurality of radially disposed reinforcing members interconnected between the inner face of said plate and the inner face of said flange.

6. An abrasive wheel of the class described, comprising: a rigid rotatable core including a circular plate provided with a laterally extended peripherally disposed flange; said flange being provided with a plurality of axially extended slots which are open on the free end thereof; a plurality of presser members slidably mounted in said slots; each of said presser members including a pair of spaced apart leg portions mounted in a pair of adjacent slots and a flexible head integrally connected between said pair of leg portions and being freely available for radial expansion by centrifugal force; and, an encircling band of abrasive material embracing said heads.

7. An abrasive wheel of the class described, comprising: a rigid rotatable core including a circular plate provided with a laterally extended peripherally disposed flange; said flange being provided with a plurality of axially extended slots which are open on the free end thereof; a plurality of presser members mounted on said flange; each of said presser members including a leg portion and a flexible head portion freely available for radial expansion by centrifugal force; said leg portion having a reduced neck portion adapted to be slidably mounted in one of said slots; and, an encircling band of abrasive material embracing said heads.

8. An abrasive Wheel of the class described, comprising: a rigid rotatable core including a circular plate provided with a laterally extended peripherally disposed flange; said flange being provided with a plurality of axially extended slots which are open on the free end thereof; a plurality of presser members mounted on said flange; each of said presser members including a leg portion and a flexible head portion freely available for radial expansion by centrifugal force; said leg portion adapted to be slidably mounted in one of said slots and in engagement with said plate; and, an encircling band of abrasive material embracing said heads.

9. An abrasive wheel of the class described, comprising: a rigid rotatable core including a circular plate provided with a laterally extended peripherally disposed flange; said flange being provided with a plurality of axially extended slots which are open on the free end thereof; a plurality of presser members mounted on said flange; each of said presser members including a leg portion and a flexible head portion freely available for radial expansion by centrifugal force; said leg portion adapted to be slightly mounted in one of said slots and in engagement with 7 said plate; an encircling band of abrasive material embracing said heads; and, said flexible head extending beyond the inner end of the leg portion and over the periphery of said plate.

10. An abrasive wheel of the class described, comprising: a rigid rotatable core including a circular plate provided with a laterally extended peripherally disposed flange; said flange being provided with a plurality of axial ly extended slots which are open on the free end thereof; a plurality of presser members mounted on said flange; each of said presser members including a leg portion and a flexible head portion freely available for radial expansion by centrifugal force; said leg portion adapted to be slidably mounted in one of said slots and in engagement with said plate; an encircling band of abrasive material embracing said heads; said flexible head extending beyond the inner end of the leg portion and over the periphery of said plate; and, a plurality of radially disposed reinforcing members interconnected between the inner face of said plate and the inner face of said flange.

11. An abrasive wheel of the class described, comprising: a rigid rotatable core including a circular plate provided with a laterally extended peripherally disposed flange; said flange being provided with a plurality of axially extended slots which are open on the free end thereof; a plurality of presser members mounted on said flange; each of said presser members including a leg portion and a flexible head portion freely available for radial expansion by centrifugal force; said leg portion adapted to be slidably mounted in one of said slots and in engagement with said plate; an encircling band of abrasive material embracing said heads; said flexible head extending beyond the inner end of the leg portion and over the periphery of said plate; a plurality of radially disposed reinforcing members interconnected between the inner face of said plate and the inner face of said flange; and, a bead on the inner end of each of said leg portions for limiting the radial outward movement of the presser members.

References Cited in the file of this patent UNITED STATES PATENTS 551,019 Webster Dec. 10, 1895 2,483,422. Larson Oct. 4, 1949 2,548,166 Larson Apr. 10, 1951 

